Investor tools · Long stock positions
Turn an example risk budget and stop price into a whole-share position size. See the capital required and the modeled loss before changing your assumptions.
Set your assumptions
How to read the result
The calculator uses the smaller of your risk-based share count and the shares your account value can fund. It rounds down to whole shares.
The starting values are an example, not a recommended risk level. This tool models a long stock position with a stop below the entry.
It excludes fees, slippage, taxes, leverage, and other positions. A stop price is not a guaranteed execution price: a market gap can produce a larger loss. How stop orders work ↗
The calculation
Risk budget = account value × risk percentage / 100
Risk per share = entry − stop
Shares = round down the smaller of (risk budget / risk per share) and (account value / entry)
A worked example
A $10,000 account with a 1% example risk budget gives $100. With a $50 entry and $48 stop, the modeled risk per share is $2. The result is 50 shares, costing $2,500, with a modeled $100 loss if sold exactly at $48.
Why can the result be zero?
One whole share may exceed the account value or the selected risk budget. The calculator does not assume fractional shares or borrowing.
Explore the return needed to recover a loss → · All investor tools
Educational calculations only. No prices or account connections are retrieved. Inputs stay in your browser; calculator usage may be measured through this site’s existing analytics, without your entered values.